If you turn data deduplication off for a storage pool by
updating the storage pool definition, new data that enters the storage
pool is not deduplicated.
About this task
Deduplicated data, which was in the storage pool before you
turned off data deduplication, is not reassembled. Deduplicated data
continues to be removed due to normal reclamation and deletion. All
information about data deduplication for the storage pool is retained.
Procedure
To turn off data deduplication for a storage pool, use
the UPDATE STGPOOL command and specify DEDUPLICATE=NO.
What to do next
If you turn data deduplication on for the same storage pool,
duplicate-identification processes resume, skipping any files that
are previously processed. You can change the number of duplicate-identification
processes. When you are calculating the number of duplicate-identification
processes to specify, consider the workload on the server and the
amount of data that requires data deduplication. The number of duplicate-identification
processes must not exceed the number of processor cores available
on the
IBM® Tivoli® Storage Manager server.
To
enable data deduplication for a storage pool, specify DEDUPLICATE=YES on
the UPDATE STGPOOL command.